Google apps + active sync issue

About 2 weeks ago my Google apps account that runs thru Microsoft active sync just stopped working. It worked great on my Z10 forever and then on my Z30 (running 10.2.1.3 and have been for awhile), then, it just says "account invalid, not responding"out of nowhere. I have tried everything. Deleted it a hundred times and re added. Gone thru my Google apps admin account to no avail. Had Google tech support working on it for 4 days with no luck. I went back to my old Z10 as Google suggested and it now does the same thing as my Z30. I add the account. It downloads all emails etc. Then within about 3 minutes it says. Account not synchronized, not responding. Anyone experience this? It's a blackberry thing as I tried my old iPhone 3G and it syncs perfect. So does my android tablet. Help!